Julian a



(No Model.)

J. A. HURDLE 8: A. W. STEIGER.

DYNAMOMETRIGAL GOVERNOR.

No. 389,928. Patented Sept. 25, 1888.

i f zzzessess UNITED STATES PATENT OFFICE.

JULIAN A. HURDLE AND ANDREW \V. STEIGER, OF NE? YORK, N. Y., ASSIGNQRSTO HELEN E. HURDLE, OF SAME PLACE.

DYNAMOMETRICAL GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 389,928, datedSeptember 25, 1888.

Application filed April 7. 1888. Serial No. 270,135. (No model.)

Toall whom it may concern:

Belt known that WeJULIAs AJIURDLE and ANDREW W. STEIGER, citizens of theUnited States, and residents of New York, in the county of New York andState of New York, have invented certain new and useful ImprovementsinDynamometrical Governors, of which the following is a specification.

Our invention relates to an improved dyna mometrical governor forsteam-motors, the object-being to provide mechanism which willautomatically regulate the supply of steam admitted to the cylinder.

It consists in dividing the transmitting shaft and coupling the twosections thereof together, end to end, by means of a sliding sleeve, ashereinafter described, so that the power will be transmitted from theone section to the other through a screw-thread upon thecounecting-sleeve and act against a confined spiral spring, so that anyincrease in the load will compress the spring and slide the sleeve alonguponthe shafts, this sliding movement of the sleeve being utilized tooperate a valve to'regulate the steam-supply.

In the accompanying drawings, Figure 1 is a side elevation of ourimproved governor and its connections, partially in section. Figs. 2 and3 are sections respectively on lines as a: and y y of Fig. 1.

As will be seen, the shaft is divided into the two parts A A, broughttogether end to end, and their abutting ends are preferably shaped toreduce the friction by making the one 'A conical,or partially so, asshown, toreducc the bearing-surface. At the end of the part A, andextending a portion of its length. is cut a spiral groove orscrew-thread, a. A cylindrical sleeve, B, is made to encircle the jointbetween the parts A A and to extend a short distance along the partseither Way, and that portion of the sleeve'embracing the part A has upouits inner surface a spiral thread, to correspond with and mesh into thespiral groove in said part A, so that a revolution of the shaft willcause the slecve'either to revolve therewith or he moved alonglongitudinally thereon.

Projecting pins or lugs a" a, forming a cross-head upon the end of thepart A of the shaft, are made to project outward through longitudinalslots 1) b in the sleeve B, so as to allow a longitudinal movement ofthe sleeve upon said shaft but to prevent a rotary motion thereon. Aspiral spring, 0, is made to surround the part A of the shaft,preferably within the sleeve B, and is made to abut at one end againstan annular ring, a, integral with said shaft and at the other endagainst a ring, I)", secured to the sleeve B,and preferably made to forma screw-cap upon the end thereof, as shown. The tendency of this springis to resist a longitudinalmovemcnt of the sleeve upon the shaft. 7

Let us now suppose the power to be applied to the part-A of the shaftand theload arranged to retard the revolution of the part A. It isevident that the part A, by revolving,will, by reason of thescrew-thread a, slide the sleeve B along upon the shaft.A and. compressthe spring 0 until its resistance is sufiicient to overcome theresistance of the load upon the shaft A, when both shafts will revolvetogether. If now the load should belightcned, the spring will expanduntil it is again adjusted to the load, and the sleeve, moving with it,will assume its new position upon the shaft. It is this longitudinalmovement of the sleeve B which I propose to utilize to regulate thesteam-supply by imparting its motion,through a suitable arrangement oflevels, to the stem of a valve in the steaursupply pipe. I accomplishthis, preferably as shown, by means of a ring, D, working loosely in agroove, b, formed upon the sleeve B, and having the pins 11diametrically opposite the one to the other upon the ring D, said pinsbeing engaged by the arms of a forked lever, E. The free end of thelever E is connected by means of a sec ond fork, e, and ring F to athreaded nut, G, mounted upon the threaded stem H of a valve, 1,included in the steam-supply pipe. The nut- G is provided with ahand-wheel, to'facilitate its adj nstment. Thelever E is pivoted at e tothe frame of the motor, or to a standard connected therewith, and atsuch a distance relatively from, the sleeve 'B and the valvestem H as toinsure'a proper relative motion of the two parts.

Having described our invention, what we claim is- 1. A d ynamoinetricalsteam-governor whereshaft engaging the sleeve, a cross-head upon intotwo parts, which are coupledtogether by the other part of the shaft alsoengaging the l 5 aslotted sleeve, said sleeve being connected to sleeve,and a confined spring adapted to resist one part of the shaft by ascrew-thread and to I a longitudinal motion of said sleeve, substan- 5the other part by a cross-head thereon, the tially as and for thepurpose set forth.

longitudinal movement of said sleeve being l Signed at New Yorkyin thecounty of New resisted by a confined spring, said sleeve be- York andState of New York, this 17th day of 20 ing also connected by leversWith-the steam- March, A. D. 1888. supply valve, substantially as andfor the pur- J ULIAN A. HURDLE.

IO pose set forth. ANDREW W. STEIGER.

2. In a steam-governor, the combination,

with a divided driving -sl1aft, of a sliding sleeve, a screw-thread uponone part of said in the driving-shaft of the engine is dividedWitnesses:

CHAS. E. FoULDs, THEO. R. COOKE.

